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Date: Thu, 13 Jun 2013 21:02:48 +0800
From: Tang Chen <tangchen@...fujitsu.com>
To: tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
prarit@...hat.com
Cc: x86@...nel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [Part1 PATCH v5 01/22] x86: Change get_ramdisk_{image|size}() to global
From: Yinghai Lu <yinghai@...nel.org>
This patch does two things:
1. Change get_ramdisk_image() and get_ramdisk_size() to global.
2. Make get_ramdisk_image() and get_ramdisk_size() take a
boot_params pointer parameter.
The whole patch-set tries to split ACPI initrd table override
procedure into two steps: finding and copying.
The finding step is done at head_32.S and head64.c stage. So we
need to call get_ramdisk_image() and get_ramdisk_size() in these
two files.
And also, in head_32.S, it can only access boot_params via physical
address during 32bit flat mode, so make get_ramdisk_image() and
get_ramdisk_size() take a boot_params pointer, so that we can pass
a physical address to code in head_32.S.
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Acked-by: Tejun Heo <tj@...nel.org>
Tested-by: Thomas Renninger <trenn@...e.de>
Reviewed-by: Tang Chen <tangchen@...fujitsu.com>
Tested-by: Tang Chen <tangchen@...fujitsu.com>
---
arch/x86/include/asm/setup.h | 3 +++
arch/x86/kernel/setup.c | 28 ++++++++++++++--------------
2 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index b7bf350..4f71d48 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -106,6 +106,9 @@ void *extend_brk(size_t size, size_t align);
RESERVE_BRK(name, sizeof(type) * entries)
extern void probe_roms(void);
+u64 get_ramdisk_image(struct boot_params *bp);
+u64 get_ramdisk_size(struct boot_params *bp);
+
#ifdef __i386__
void __init i386_start_kernel(void);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 56f7fcf..66ab495 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -297,19 +297,19 @@ static void __init reserve_brk(void)
#ifdef CONFIG_BLK_DEV_INITRD
-static u64 __init get_ramdisk_image(void)
+u64 __init get_ramdisk_image(struct boot_params *bp)
{
- u64 ramdisk_image = boot_params.hdr.ramdisk_image;
+ u64 ramdisk_image = bp->hdr.ramdisk_image;
- ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
+ ramdisk_image |= (u64)bp->ext_ramdisk_image << 32;
return ramdisk_image;
}
-static u64 __init get_ramdisk_size(void)
+u64 __init get_ramdisk_size(struct boot_params *bp)
{
- u64 ramdisk_size = boot_params.hdr.ramdisk_size;
+ u64 ramdisk_size = bp->hdr.ramdisk_size;
- ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
+ ramdisk_size |= (u64)bp->ext_ramdisk_size << 32;
return ramdisk_size;
}
@@ -318,8 +318,8 @@ static u64 __init get_ramdisk_size(void)
static void __init relocate_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 area_size = PAGE_ALIGN(ramdisk_size);
u64 ramdisk_here;
unsigned long slop, clen, mapaddr;
@@ -358,8 +358,8 @@ static void __init relocate_initrd(void)
ramdisk_size -= clen;
}
- ramdisk_image = get_ramdisk_image();
- ramdisk_size = get_ramdisk_size();
+ ramdisk_image = get_ramdisk_image(&boot_params);
+ ramdisk_size = get_ramdisk_size(&boot_params);
printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
" [mem %#010llx-%#010llx]\n",
ramdisk_image, ramdisk_image + ramdisk_size - 1,
@@ -369,8 +369,8 @@ static void __init relocate_initrd(void)
static void __init early_reserve_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
if (!boot_params.hdr.type_of_loader ||
@@ -382,8 +382,8 @@ static void __init early_reserve_initrd(void)
static void __init reserve_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
u64 mapped_size;
--
1.7.1
--
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